Example of printing by calling ashx in RDLC

After studying for a long time, I started to embed the exported print on the aspx page. I think this is a waste of resources, so now I am embedded in the ashx file that is not consuming resources, the differences between exporting and embedding aspx and ashx of RDLC are involved: the following is the ashx code: [csharp] using System; using System. collections. generic; using System. web; using Microsoft. reporting. webForms; using System. data; using System. data. sqlClient; namespace V3WEB. ashx. car {// <summary> /// abstract of Tra_Docnum_CostCount_Rpt /// </summary> public class Tra_Docnum_CostCount_Rpt: IHttpHandler {Public void ProcessRequest (HttpContext context) {ExportPDF (context);} private DataTable LoadData (HttpContext context) {DataTable dt = null; string d1 = "2012-01-01 "; // Request ["d1"]. toString (); string d2 = "2012-01-01"; // Request ["d2"]. toString (); string dept = ""; // Request ["dept"]. toString (); string carno = ""; // Request ["carno"]. toString (); dt = BLL. car. factory. getTra_DocnumBLL (). tra_Do Cnum_CostCount (d1, d2, dept, carno); return dt;} public void ExportPDF (HttpContext context) {LocalReport localReport = new LocalReport (); localReport. reportPath = HttpContext. current. server. mapPath ("/Report/Car/Tra_Docnum_CostCount.rdlc"); DataTable dt = LoadData (context); ReportDataSource reportDataSource = new ReportDataSource ("<span style =" color: # FF0000; "> DataSet1 </span>", dt); // you must specify 1 "is the name of the dataset localReport. dataSources. add (reportDataSource); string reportType = "<span style =" color: # FF0000; "> PDF </span>"; // EXCEL can be used to export data. String mimeType; string encoding; string fileNameExtension; string deviceInfo = "<DeviceInfo>" + "<OutputFormat> PDF </OutputFormat>" + // "<PageWidth> 8.5in </PageWidth>" + // "<PageHeight> 11in </PageHeight> "+ //" <MarginTop> 0.5in </MarginTop> "+ //" <MarginLeft> 1in </MarginLeft> "+ //" <MarginRight> 1in </MarginRight> "+ //" <MarginBottom> 0.5in </MarginBottom> "+" </DeviceInfo> "; warning [] warnings; string [] streams; byte [] renderedBytes; // generate a PDF file to renderedBytes, renderedBytes = localReport. render (reportType, deviceInfo, out mimeType, out encoding, out fileNameExtension, // you can set the file name out streams, out warnings); context. response. buffer = true; context. response. clear (); context. response. contentType = mimeType; context. response. binaryWrite (renderedBytes); context. response. flush (); context. response. end () ;}public bool IsReusable {get {return false ;}}}note: 1. HttpContext. current. server. mapPath (""); Introduce "microsoft. reportview. webforms "; 2. In ReportDataSource (" DataSet1 ", dt), the name of DataSet1 must be the same as the name of the file named in RDLC. (the following may be a good understanding) in addition, the export code in ASPX is attached for comparison: [csharp] using System; using System. collections. generic; using System. web; using System. web. UI; using System. web. UI. webControls; using Microsoft. reporting. webForms; using System. data; using System. data. sqlClient; namespace V3WEB. report. car {public partial class Tra_Docnum_CostCount_Rpt: System. web. UI. page {protected void Page_Load (object sender, EventArgs e) {ExportPDF ();} private DataTable LoadData () {DataTable dt = null; string d1 = "2012-01-01 "; // Request ["d1"]. toString (); string d2 = "2012-01-01"; // Request ["d2"]. toString (); string dept = ""; // Request ["dept"]. toString (); string carno = ""; // Request ["carno"]. toString (); dt = BLL. car. factory. getTra_DocnumBLL (). tra_Docnum_CostCount (d1, d2, dept, carno); return dt;} public void ExportPDF () {LocalReport localReport = new LocalReport (); localReport. reportPath = Server. mapPath ("Tra_Docnum_CostCount.rdlc"); DataTable dt = LoadData (); ReportDataSource reportDataSource = new ReportDataSource ("DataSet1", dt); localReport. dataSources. add (reportDataSource); string reportType = "PDF"; string mimeType; string encoding; string fileNameExtension; // The DeviceInfo settings shocould be changed based on the reportType // http://msdn2.microsoft.com/en-us/library/ms155397.aspx string deviceInfo = "<DeviceInfo>" + "<OutputFormat> PDF </OutputFormat>" + // "<PageWidth> 8.5in </PageWidth> "+ //" <PageHeight> 11in </PageHeight> "+ //" <MarginTop> 0.5in </MarginTop> "+ //" <MarginLeft> 1in </MarginLeft> "+ //" <MarginRight> 1in </MarginRight> "+ //" <MarginBottom> 0.5in </MarginBottom> "+" </DeviceInfo> "; warning [] warnings; string [] streams; byte [] renderedBytes; // Render the report renderedBytes = localReport. render (reportType, deviceInfo, out mimeType, out encoding, out fileNameExtension, out streams, out warnings); Response. buffer = true; Response. clear (); Response. contentType = mimeType; Response. binaryWrite (renderedBytes); Response. flush (); Response. end ();}}}